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Flashcards in 510-7 Deck (17):
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sulcus terminalis

v shaped depression that separates the body and root of the tongue

1

foramen cecum

pit in the back of the tongue that is the remnant of the thyroid gland invagination

2

body of the tongue

anterior 2/3 of the tongue that developed from the 1st arch

3

root of the tongue

posterior 1/3 of the tongue that developed from the 3rd arch

4

2 types of tongue muscles

1.) external- one attachment outside of the tongue
2.) internal- longitudinal, transverse, vertical

5

nerve that controls the motor control of the tongue

#7 hypoglossal

6

4 types of tongue papilla

1.) circumvallate
2.) foliate
3.) filiform
4.) fungiform

7

geographic tongue

regional loss of papillae

8

filiform papillae

keratinized, no taste buds, point backwards

9

hairy tongue

overgrown papillae due to the accumulation of keratinized tissue

10

von ebner's gland

serous glands in the tongue found at the base of foliate and vallate papillae

11

circumvallate papilla

parakeratinized, have taste buds in the sides, von ebners glands in the base of clefts

12

foliate papillae

vertical folds in the side of the tongue, non keratinized, von ebners glands in the base of the cleft, taste buds on the sides

13

fungiform

taste buds at the top, keratinized thin epithelia, extensive connective tissue (appear red)

14

taste bud

columnar support and sensory cells that are replaced by stem cell basal cells. each sensory cell is innervated. microvilli at the tips of columnar cells. span the entire epithelium. pale staining.

15

tongue innervation

#5: basic sensory info
#7: taste buds in body of tongue
#9 and #10: control root of tongue

16

Taste Cell

taste molecule binds to receptor in microvilli of taste cell which depolarizes the cell and leads to the release of vesicles onto neurons